it seems to be only showing a portion of the screen for me. also, i see no enemies.
Enemies only show up once you've dodged enough stars for your score to exceed 1000 I think. That is the full screen, but I have no idea what's causing that weird blue border, I probably uploaded it wrong somehow.
Try to edit the iframe width and height, something similar happened to my game and it solved the thing :)
Thanks, I'll see if i can figure it out.
